CN111666180A - Dual-computer hot standby control method and system supporting PPT demonstration - Google Patents
Dual-computer hot standby control method and system supporting PPT demonstration Download PDFInfo
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- CN111666180A CN111666180A CN202010651922.4A CN202010651922A CN111666180A CN 111666180 A CN111666180 A CN 111666180A CN 202010651922 A CN202010651922 A CN 202010651922A CN 111666180 A CN111666180 A CN 111666180A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
- G06F11/1469—Backup restoration techniques
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/14—Error detection or correction of the data by redundancy in operation
- G06F11/1402—Saving, restoring, recovering or retrying
- G06F11/1446—Point-in-time backing up or restoration of persistent data
- G06F11/1458—Management of the backup or restore process
- G06F11/1464—Management of the backup or restore process for networked environments
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/1658—Data re-synchronization of a redundant component, or initial sync of replacement, additional or spare unit
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/4302—Content synchronisation processes, e.g. decoder synchronisation
- H04N21/4307—Synchronising the rendering of multiple content streams or additional data on devices, e.g. synchronisation of audio on a mobile phone with the video output on the TV screen
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
- H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
- H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
- H04N21/442—Monitoring of processes or resources, e.g. detecting the failure of a recording device, monitoring the downstream bandwidth, the number of times a movie has been viewed, the storage space available from the internal hard disk
- H04N21/4424—Monitoring of the internal components or processes of the client device, e.g. CPU or memory load, processing speed, timer, counter or percentage of the hard disk space used
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Abstract
The invention relates to the technical field of computer application, and discloses a dual-computer hot standby control method and a system supporting PPT demonstration, which comprises a screen connection processor, two PPT playing workstations, a control host, a page turning pen and a plurality of spliced screens, wherein the screen connection processor is connected with the two PPT playing workstations; the two PPT playing workstations comprise a main PPT playing workstation and a standby PPT playing workstation; the two PPT playing workstations are respectively connected with the screen connection processor; the screen connection processor is connected with the spliced screens; and the screen connection processor is used for splicing a plurality of spliced screens into a large screen and managing video signal switching. The invention synchronizes the playing states of the two PPT workstations in real time, controls the host to monitor the playing state of the main PPT playing workstation in real time, accurately judges the abnormal playing condition, does not need manual monitoring and processing, and has quick response. The invention avoids the adverse effect caused by equipment failure during reporting and demonstration and improves the high availability of the whole system.
Description
Technical Field
The invention relates to the technical field of computer application, in particular to a dual-computer hot standby control method and system supporting PPT demonstration.
Background
The enterprise user can start demonstration of the PPT containing the business content on the workstation and throw the PPT onto the large screen of the command center, the effect of playing the PPT by the large-size high-definition screen is very shocked, and a visitor can be well informed.
In the prior art, a dual-signal source can be used as a standby scheme for a spliced screen, but the high-availability goal cannot be realized, and whether the spliced screen needs to be switched to standby equipment or not and whether the spliced screen needs to be switched to the standby equipment or not still needs to be manually judged. The method has the advantages that in a demonstration and report scene, when the PPT software cannot turn pages, the work station is in a black screen state and the like, the staff can be in-situ strained, and the signal source of the standby PPT work station is switched to the large screen through the splicing processor. The process requires the cooperation of the speaker and the staff, the operation is inconvenient and time is wasted, and some negative effects can be brought to the demonstration reporting effect. Therefore, the high availability goal of solving the disadvantages of the manual emergency scheme and realizing the non-inductive switching becomes a difficult problem to be solved urgently by researchers in the field.
Disclosure of Invention
The invention provides a dual-computer hot standby control method and system supporting PPT demonstration, and therefore the problems in the prior art are solved.
In a first aspect, the invention provides a dual-computer hot standby control system supporting PPT demonstration, which comprises a screen-connected processor, two PPT playing workstations, a control host, a page turning pen and a plurality of spliced screens, wherein the screen-connected processor is connected with the two PPT playing workstations; the two PPT playing workstations comprise a main PPT playing workstation and a standby PPT playing workstation; the two PPT playing workstations are respectively connected with the screen connection processor; the screen connection processor is connected with the spliced screens; the screen connection processor is used for splicing a plurality of spliced screens into a large screen and managing video signal switching; the control host is respectively connected with the two PPT playing workstations.
Furthermore, the system also comprises audio equipment, and the two PPT playing workstations are respectively connected with the audio equipment.
Furthermore, the control host is provided with a main and standby machine synchronous playing module, and the main and standby machine synchronous playing module is used for synchronously sending instructions to the main PPT playing workstation and the standby PPT playing workstation and monitoring information returned by the main PPT playing workstation and the standby PPT playing workstation in real time; the command comprises a PPT starting command or a PPT page turning command; the information comprises the starting state of PPT software or the page turning state of a PPT file.
Further, the control host is provided with a main standby machine switching module, and the main standby machine switching module is used for switching the display signals of the large screen from the video signals of the main PPT playing workstation to the video signals of the standby PPT playing workstation within a second preset time period when the working state of the main PPT playing workstation is abnormal.
Furthermore, the page turning pen is connected with the control host computer in a wired or wireless mode.
Furthermore, the page turning pen is provided with a PPT start key and a PPT page turning key.
In a second aspect, the present invention provides a dual-computer hot standby control method supporting PPT demonstration, including the following steps:
s1) setting a first preset time length, and sending the network state message of the main PPT playing workstation and the PPT current playing state to the control host at intervals of the first preset time length;
s2) judging whether the current playing state of the network state message or the PPT is abnormal by the control host, if so, entering the step S4); if not, go to step S3);
s3) utilizing the control host to carry out a synchronous playing mechanism of the main PPT playing workstation and the standby PPT playing workstation, and returning to the step S1);
s4) carrying out a video signal switching mechanism between the main PPT playing workstation and the standby PPT playing workstation;
s5) to complete the video signal switching between the main PPT playback workstation and the standby PPT playback workstation.
Further, in step S3), the method for performing synchronous playback on the main PPT playback workstation and the standby PPT playback workstation by using the control host includes the following steps:
s31) pressing a PPT start key or a PPT page turning key of the page turning pen, and sending an instruction to the control host by the page turning pen in a wired or wireless transmission mode; the command comprises a PPT starting command or a PPT page turning command;
s32) the control host sends PPT starting instruction or PPT page turning instruction to the main PPT playing workstation and the standby PPT playing workstation at the same time, and the main PPT playing workstation and the standby PPT playing workstation receive the PPT starting instruction or the PPT page turning instruction respectively;
s33) the main PPT playing workstation and the standby PPT playing workstation respectively start PPT software or turn pages of a PPT file;
s34) the main PPT playing workstation and the standby PPT playing workstation respectively send the starting state of the PPT software or the page turning state of the PPT file to the control host;
s35) the control host judges whether the starting state of the PPT software or the page turning state of the PPT file is abnormal, if so, the control host returns to the step S32); if not, the synchronization of the playing states of the two PPT playing workstations is completed.
Further, in step S4), a video signal switching mechanism between the main PPT playback workstation and the standby PPT playback workstation is performed, including the following steps:
s41) the control host sends a command for switching the standby machine signal to the large screen to the splicing processor;
s42) setting a second preset time, receiving an instruction of switching a standby machine signal to a large screen by the splicing processor, and switching the display signal of the large screen from the video signal of the main PPT playing workstation to the video signal of the standby PPT playing workstation within the second preset time;
s43) judging whether the switching is successful, if so, finishing the video signal switching between the main PPT playing workstation and the standby PPT playing workstation; if not, return is made to step S41).
The invention has the beneficial effects that: the invention synchronizes the playing states of the two PPT workstations in real time, controls the host to monitor the playing state of the main PPT playing workstation in real time, accurately judges the abnormal playing condition when encountering network abnormality and PPT operation abnormality, does not need manual monitoring and processing, and has quick response. The invention avoids the adverse effect caused by equipment failure during reporting and demonstration and improves the high availability of the whole system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments are briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dual-computer hot-standby control system supporting PPT demonstration according to this embodiment.
Fig. 2 is a flowchart illustrating a dual-computer hot-standby control method supporting PPT demonstration according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order, and it should be understood that the terms so used are interchangeable under appropriate circumstances and are merely used to describe the distinguishing manner in which the embodiments of the present invention distinguish between similar elements. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of elements is not necessarily limited to those elements, but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
In a first embodiment, the present invention provides a dual-computer hot-standby control system supporting PPT demonstration, as shown in fig. 1, including a screen-connected processor, two PPT playing workstations, a control host, a page turning pen, an audio device, and a plurality of spliced screens. The two PPT playing workstations are respectively connected with the audio equipment. The two PPT playing workstations comprise a main PPT playing workstation and a standby PPT playing workstation; the two PPT playing workstations are respectively connected with the screen connection processor; the screen connection processor is connected with the spliced screens; the screen connection processor is used for splicing a plurality of spliced screens into a large screen and managing video signal switching; the control host is respectively connected with the two PPT playing workstations.
The control host is provided with a main and standby machine synchronous playing module which is used for synchronously sending instructions to the main PPT playing workstation and the standby PPT playing workstation and monitoring information returned by the main PPT playing workstation and the standby PPT playing workstation in real time; the command comprises a PPT starting command or a PPT page turning command; the information comprises the starting state of PPT software or the page turning state of a PPT file.
The control host is provided with a main standby machine switching module which is used for switching the display signals of the large screen from the video signals of the main PPT playing workstation to the video signals of the standby PPT playing workstation within a second preset time length when the working state of the main PPT playing workstation is abnormal.
The page turning pen is in wireless connection with the control host through a 2.4GHz wireless transmission technology. The page turning pen is provided with a PPT starting key and a PPT page turning key. The page turning pen can also be connected with the control host computer through a wire.
The embodiment also provides a dual-computer hot standby control method supporting PPT demonstration, as shown in fig. 2, including the following steps:
s1) setting the first preset time length as 1 second, and sending the network state message of the main PPT playing workstation and the PPT current playing state to the control host every 1 second;
s2) judging whether the current playing state of the network state message or the PPT is abnormal by the control host, if so, entering the step S4); if not, go to step S3);
s3) utilizing the control host to carry out a synchronous playing mechanism of the main PPT playing workstation and the standby PPT playing workstation, and returning to the step S1);
the method for synchronously playing the main PPT playing workstation and the standby PPT playing workstation by using the control host comprises the following steps:
s31) pressing a PPT start key or a PPT page turning key of the page turning pen, and sending an instruction to the control host by the page turning pen in a wired or wireless transmission mode; the command comprises a PPT starting command or a PPT page turning command;
s32) the control host sends PPT starting instruction or PPT page turning instruction to the main PPT playing workstation and the standby PPT playing workstation at the same time, and the main PPT playing workstation and the standby PPT playing workstation receive the PPT starting instruction or the PPT page turning instruction respectively;
s33) the main PPT playing workstation and the standby PPT playing workstation respectively start PPT software or turn pages of a PPT file;
s34) the main PPT playing workstation and the standby PPT playing workstation respectively send the starting state of the PPT software or the page turning state of the PPT file to the control host;
s35) the control host judges whether the starting state of the PPT software or the page turning state of the PPT file is abnormal, if so, the control host returns to the step S32); if not, the synchronization of the playing states of the two PPT playing workstations is completed.
In order to satisfy the requirement that PPT files of a main PPT playing workstation and a standby PPT playing workstation can play page numbers synchronously, and ensure that contents displayed on a large screen are consistent with those displayed before after the main PPT playing workstation is switched into the standby PPT playing workstation, a control host is required to manage the consistency of the playing contents of the two PPT playing workstations. When a speaker presses a PPT start key or a PPT page turning key of a page turning pen, the page turning pen sends an instruction to a control host computer in a wired or wireless transmission mode; the control host sends PPT starting instructions or PPT page turning instructions to the two PPT playing workstations respectively, and ensures that the two PPT playing workstations have correctly responded to the instructions respectively according to messages (namely the starting state of PPT software or the page turning state of PPT files) returned by the two PPT playing workstations, thereby achieving the purpose of synchronizing the playing states of the two PPT playing workstations. Step S35), the control host judges whether the startup state of the PPT software or the page turning state of the PPT file is abnormal, if so, the startup failure of the PPT software or the page turning of the PPT file is not successful, and the main PPT playing workstation or the standby PPT playing workstation does not correctly respond to the instruction sent by the control host, and then the step S32) is returned, and the two PPT playing workstations carry out re-playing synchronization.
S4) to perform a video signal switching mechanism between the main PPT playback workstation and the standby PPT playback workstation, comprising the following steps:
s41) the control host sends a command for switching the standby machine signal to the large screen to the splicing processor;
s42) setting a second preset time, receiving an instruction of switching a standby machine signal to a large screen by the splicing processor, and switching the display signal of the large screen from the video signal of the main PPT playing workstation to the video signal of the standby PPT playing workstation within the second preset time;
s43) judging whether the switching is successful, if so, finishing the video signal switching between the main PPT playing workstation and the standby PPT playing workstation; if not, return is made to step S41).
S5) to complete the video signal switching between the main PPT playback workstation and the standby PPT playback workstation.
In order to realize high available switching capacity between the two PPT broadcasting workstations, the control host can monitor the working state of the main PPT broadcasting workstation in real time. The control host computer can monitor the abnormal condition of a main PPT playing workstation in real time while ensuring the PPT file playing synchronization between two PPT playing workstations, and the specific mechanism is that the control host computer can acquire a network state message and the current PPT playing state from the main PPT playing workstation every 1 second. When one of the network message and the PPT playing state is acquired to be abnormal, the host is controlled to see that the main PPT playing workstation is abnormal, the condition of switching the main PPT playing workstation to the standby PPT playing workstation is met at the moment, an instruction of switching a standby machine signal to a large screen is immediately sent to the splicing processor, the splicing processor receives the instruction of switching the standby machine signal to the large screen and then timely performs signal switching action, the display signal of the large screen is switched to the video signal of the standby PPT playing workstation from the video signal of the main PPT playing workstation within a second preset time, and the second preset time is set to be 2 seconds in the embodiment. The lecturer can continue to keep the flow of the lecture progress, and the page turning action of the page turning pen is not affected.
The embodiment also comprises the step of connecting the output signals of the display cards of the two PPT playing workstations to an input channel of the splicing processor through a video cable, so that the PPT playing content of each PPT playing workstation can be correctly projected onto a large screen. The control host and the two PPT playing workstations belong to the same local area network. When the wireless transmission mode is adopted, the page turning pen is provided with a wireless receiver, the wireless receiver of the page turning pen is inserted into the USB interface of the control host, and if the control host is too far away from the position of the speaker, the control host can be extended by using the USB extender.
In this embodiment, communication information of two PPT playing workstations is configured on the control host, and the test is normal, and the control host can simultaneously perform control of starting demonstration and turning pages back and forth on the PPTs in the two workstations. The splicing processor comprises a serial port control interface, and the serial port control interface of the splicing processor is accessed to a local area network belonging to the same control host so as to ensure that the splicing processor can receive an instruction sent by the control host; if the splicing processor does not support a network control mode, a serial port control interface of the splicing controller is connected with a serial port of the control host by using a serial port through line, so that a control instruction from the control host is received. The embodiment further includes configuring a control instruction of the splicing processor in the control host, where the control instruction configuring the splicing processor in the control host includes a signal switching protocol and a layout mode switching protocol.
In this embodiment, the network of the main PPT workstation is disconnected, shut down or quit the PPT operation manually, and the control host also triggers the switching action of the main and standby machines (i.e. entering a video signal switching mechanism between the main PPT playing workstation and the standby PPT playing workstation), so that the large screen is seamlessly switched to the PPT picture of the standby PPT playing workstation, and the speech process is not affected.
The control host automatically triggers the switching action of the main machine and the standby machine when judging the abnormal playing, and on the other hand, a control interface of the control host is provided with an administrator prompting module which is used for warning that the standby PPT playing workstation is started and the hot standby state is invalid. The administrator can repair the main PPT playing workstation at this time, and can manually start the main PPT playing workstation again after the main PPT playing workstation is recovered to be normal, so that the hot standby state is recovered.
By adopting the technical scheme disclosed by the invention, the following beneficial effects are obtained:
the invention synchronizes the playing states of the two PPT workstations in real time, and the two PPT workstations can be synchronized when a speaker starts playing or turns pages. The invention also supports that when the main PPT playing workstation exits playing or jumps to other pages by other reasons, the control host actively starts a synchronization mechanism to synchronize the working state of the standby PPT playing workstation with the main PPT playing workstation. The control host can monitor the working state of the main PPT playing workstation in real time, and when network abnormality and PPT operation abnormality are encountered, the abnormal playing condition is accurately judged, manual monitoring and processing are not needed, and response is rapid. The invention avoids the adverse effect caused by equipment failure during reporting and demonstration and improves the high availability of the whole system.
It should be understood by those skilled in the art that the timing sequence of the method steps provided in the above embodiments may be adaptively adjusted according to actual situations, or may be concurrently performed according to actual situations.
All or part of the steps in the methods according to the above embodiments may be implemented by a program instructing related hardware, where the program may be stored in a storage medium readable by a computer device and used to execute all or part of the steps in the methods according to the above embodiments. The computer device, for example: personal computer, server, network equipment, intelligent mobile terminal, intelligent home equipment, wearable intelligent equipment, vehicle-mounted intelligent equipment and the like; the storage medium, for example: RAM, ROM, magnetic disk, magnetic tape, optical disk, flash memory, U disk, removable hard disk, memory card, memory stick, network server storage, network cloud storage, etc.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and such modifications and improvements should also be considered within the scope of the present invention.
Claims (9)
1. A dual-computer hot standby control system supporting PPT demonstration is characterized by comprising a screen connection processor, two PPT playing workstations, a control host, a page turning pen and a plurality of spliced screens; the two PPT playing workstations comprise a main PPT playing workstation and a standby PPT playing workstation; the two PPT playing workstations are respectively connected with the screen connection processor; the screen connection processor is connected with the spliced screens; the screen connection processor is used for splicing the spliced screens into a large screen and managing video signal switching; and the control host is respectively connected with the two PPT playing workstations.
2. The dual-computer hot-standby control system supporting PPT demonstration according to claim 1, further comprising an audio device, wherein said two PPT broadcasting workstations are respectively connected to said audio device.
3. The dual-computer hot-standby control system supporting PPT demonstration as claimed in claim 1 or 2, wherein the control host is provided with a primary and backup computer synchronous playing module, and the primary and backup computer synchronous playing module is configured to synchronously send instructions to the primary PPT playing workstation and the backup PPT playing workstation, and monitor information returned by the primary PPT playing workstation and the backup PPT playing workstation in real time; the instruction comprises a PPT starting instruction or a PPT page turning instruction; the information comprises the starting state of PPT software or the page turning state of a PPT file.
4. The dual-computer hot-standby control system supporting PPT demonstration as claimed in claim 3, wherein said control host is provided with a primary and secondary computer switching module, said primary and secondary computer switching module is configured to switch the display signal of the large screen from the video signal of the primary PPT playing workstation to the video signal of the secondary PPT playing workstation within a second preset duration when the working status of the primary PPT playing workstation is abnormal.
5. The dual-computer hot-standby control system supporting PPT demonstration according to claim 1 or 4, wherein the page turning pen is connected with the control host computer through wire or wireless.
6. The dual-computer hot-standby control system supporting PPT demonstration according to claim 1, wherein the page-turning pen is provided with a PPT start key and a PPT page-turning key.
7. A dual-computer hot-standby control method supporting PPT demonstration, which is applied to the dual-computer hot-standby control system supporting PPT demonstration as claimed in any one of claims 1 to 6, and comprises the following steps:
s1) setting a first preset time length, and sending the network state message of the main PPT playing workstation and the PPT current playing state to the control host at intervals of the first preset time length;
s2) judging whether the network state message or the PPT current playing state is abnormal through a control host, if so, entering the step S4); if not, go to step S3);
s3) utilizing the control host to carry out a synchronous playing mechanism of the main PPT playing workstation and the standby PPT playing workstation, and returning to the step S1);
s4) carrying out a video signal switching mechanism between the main PPT playing workstation and the standby PPT playing workstation;
s5) finishing the video signal switching between the main PPT playing workstation and the standby PPT playing workstation.
8. The dual-computer hot-standby control method supporting PPT demonstration as claimed in claim 7, wherein in step S3), the mechanism for performing synchronous playing of the master PPT-playing workstation and the standby PPT-playing workstation by using the control host comprises the following steps:
s31) pressing a PPT start key or a PPT page turning key of a page turning pen, wherein the page turning pen sends an instruction to a control host computer in a wired or wireless transmission mode; the instruction comprises a PPT starting instruction or a PPT page turning instruction;
s32) the control host sends PPT starting instruction or PPT page turning instruction to the main PPT playing workstation and the standby PPT playing workstation at the same time, and the main PPT playing workstation and the standby PPT playing workstation receive the PPT starting instruction or the PPT page turning instruction respectively;
s33) the main PPT playing workstation and the standby PPT playing workstation respectively start PPT software or turn pages of a PPT file;
s34) the main PPT playing workstation and the standby PPT playing workstation respectively send the starting state of PPT software or the page turning state of the PPT file to the control host;
s35) the control host judges whether the starting state of the PPT software or the page turning state of the PPT file is abnormal, if so, the control host returns to the step S32); if not, the synchronization of the playing states of the two PPT playing workstations is completed.
9. The dual-computer hot-standby control method supporting PPT demonstration as claimed in claim 7 or 8, wherein in step S4), a video signal switching mechanism between the main PPT broadcasting workstation and the standby PPT broadcasting workstation is performed, which includes the following steps:
s41) the control host sends a command for switching a standby machine signal to a large screen to the splicing processor;
s42) setting a second preset time, receiving an instruction of switching the standby machine signal to a large screen by the splicing processor, and switching the display signal of the large screen from the video signal of the main PPT playing workstation to the video signal of the standby PPT playing workstation within the second preset time;
s43) judging whether the switching is successful, if so, finishing the video signal switching between the main PPT playing workstation and the standby PPT playing workstation; if not, return is made to step S41).
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113891124A (en) * | 2021-11-04 | 2022-01-04 | 北京欧珀通信有限公司 | Audio and video playing method and device, electronic equipment, server and storage medium |
| WO2022105409A1 (en) * | 2020-11-17 | 2022-05-27 | 海信视像科技股份有限公司 | Fault diagnosis method, terminal device, and display device |
-
2020
- 2020-07-08 CN CN202010651922.4A patent/CN111666180A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022105409A1 (en) * | 2020-11-17 | 2022-05-27 | 海信视像科技股份有限公司 | Fault diagnosis method, terminal device, and display device |
| CN113891124A (en) * | 2021-11-04 | 2022-01-04 | 北京欧珀通信有限公司 | Audio and video playing method and device, electronic equipment, server and storage medium |
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